game = [[2, 2, 3],
[1, 1, 3],
[0, 0, 3]]
vertical = []
for row in game:
print(vertical.append(row[2]))
I try to understand the append function by print it out. The output is kind of confusing to me. Is that because I did not add any value to the vertical variable?
You should have a look into the documentation of the append() function. In short: It doesn't return a value. This is why you get NULL instead of your wanted 3.
This is what you want to do instead:
game = [[2, 2, 3],
[1, 1, 3],
[0, 0, 3]]
vertical = []
for row in game:
vertical.append(row[2])
print(vertical)
If you have additional questions, feel free to ask.
Edit: adding the print(vertical) outside of the for loop makes more sense for actual code, inside the for function is however better for debugging.
